We might wander about for hours and waste a great deal of time.

Both sides have wasted a great deal of effort trying to do something that simply could not be done.

This whole farce is wasting a great deal of time.

You have wasted a great deal of my time.

You have already wasted a great deal of everyone's time.

But don't waste a great deal of time on it.

Changing it, he decided, would waste a great deal of valuable time, and might actually make things worse.

And not only because they are likely to waste a great deal of time.

Simply that we have wasted a great deal of money on education.

You'll waste a great deal of time on your own, you know, and you may not get the chance to come again.